Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/42282
Title: Feed intake and prediction assessments using the NRC, CNCPS and BR-CORTE systems in Nellore and Red Norte steers finished in feedlot
Other Titles: Consumo alimentar e avaliação das predições pelos sistemas NRC, CNCPS e BR-CORTE em novilhos Nelore e Red Norte terminados em confinamento
Keywords: Crossbreeding
Markers
Nutritional requirements
Zebu breeds
Cruzamento
Indicadores
Exigências nutricionais
Zebuínos
Issue Date: Feb-2010
Publisher: Sociedade Brasileira de Zootecnia (SBZ)
Citation: MACHADO NETO, O. R. et al. Feed intake and prediction assessments using the NRC, CNCPS and BR-CORTE systems in Nellore and Red Norte steers finished in feedlot. Revista Brasileira de Zootecnia, Viçosa, MG, v. 39, n. 2, p. 394-401, Feb. 2010. DOI: 10.1590/S1516-35982010000200024.
Abstract: The objective of this research was to evaluate the dry matter intake (DMI) and nutrient consumption in Nellore and Red Norte steer finished in a feedlot and compare the actual and predicted values by NRC (2000), CNCPS 5.0 and BR-CORTE systems. Forty-one animals, 19 Nellore and 22 Red Norte steers, with initial live weight of 361 ± 31 kg and 367 ± 30 kg, respectively, were used. The experiment lasted 84 days, with 28 days for adaptation and 56 experimental days. The animals were weighed at the beginning and at end of each 28-day period after 16 hours fasting. The dry matter intake was estimated by LIPE, chrome oxide and indigestible dry matter (DMi) markers. There were no differences between Nellore and Red Norte DMI when expressed in kg/day (10.66 vs. 10.44). When intake was expressed in percentage of live weight (% LW), Nellore steer presented higher intake than Red Norte steer (2.55 vs. 2.39%). All the systems evaluated presented a lower predicted intake than the observed intake. However, these differences were smaller for crossbreed animals.
URI: http://repositorio.ufla.br/jspui/handle/1/42282
Appears in Collections:DZO - Artigos publicados em periódicos



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